Power-hammer.



PATENTED SEPT. 1o, 1907. P. s. MAGGOWAN.

POWER HAMMER.

APPLICATION FAILED FEB. 28, 1907.

` 2 SHEETS-SHEET L 2 f YWH. H E 2 1 1 m No. 865,787. PATENTED SEPT. 1K0, 190'7.

P. S. lyIAGfzrOWAlI. POWER HAMMER.

APPLIUATION FILED PEB. 28. 1907.

"b ATTORNEYS v u .I asmaqgowan.

2 SHEETS--SHEET-Z.

entran STATES PATENT OFFICE PETER S. MAOGOWAN, OF ST. LOUIS, MISSOURI, ASSIGNOR TO MACGOWAN AND FINIGAN FOUNDRY t MACHINE CO., OF ST. LOUIS7 MISSOURI, A CORPORATION OF MISSOURI:

POWER-HAMMER.

ivo. 865,787.

Specfcatonof Letters Patent.

Patented Sept. 10, 1907'.

Application tiled February 28,1907. Serial No 359,766.

To all whom it may concern:

Be it known that I, PETER S. MACGOWAN, a citizen of the United States, residing at St. Louis, in the State of Missouri, have invented certain new and useful Power-Hammers, of which the following is such a full, clear, and exact description as will enable anyone skilled inathe art to which it appertains to make and use the same, reference being had to the accompanying drawings, forming part of this specification.

My invention relates to improvements in power hamjusted after the machine has been assembled.

My invention relates in part to means for accomplishing the above adjustments.

I have also found that in hammers of this class where the ends of the spring are connected by rigid connecting rods to the stem oi the hammer, Ithe jar upon the parts is so great as to cause the parts to crystallize and become readily broken.

My invention consists in part in constructing the connecting rods so as to overcome the above difficulty.v

In the accompanying drawings, which illustrate one form of hammer made in accordance with my invention, Figure l is a side elevation of the complete machine, Figs. 2 and 3 are enlarged sectional views showing details of construction, Fig..4 is a detailed view of the lock nuts for the connecting rods and Fig. 5 is aY front elevation of the complete machine, some of the parts being removed. i

Like marks of reference refer to similar parts in the several views ofthe drawings. I

l() represents the base or cone of the machine,- carrying the anvil ll. Preferably formed integral with the cone or base 10 is the frame 12.

This frame 12 `is provided with a face plate 13, towhich is secured one part I4 of the guide, the other part l5 of'said guide being secured to the part 14 by boltsl passing' through both said parts into the face plate 13.'- In the guides 14 and l5 are formed ways 24 in which the sten1l7 of the hammer travels. TheA cross head 18 also travels in these ways 24. The cross head-18 is connected byv means of a pitman 19 with the wrist pin 20 on a disk 21. This disk 2l is driven by means of the lclutch mechanism 22 controlled by a foot lever 23.

In order to adjust the connection `between the hammer 17 and the wrist pin 20, I make the pitman 19 in two parts and interpose between said two parts a rod 25, carrying right and left hand threads and engaging with internal threads in the two parts of the pitman 19 as shown in detail in Fig. 3. The central part of the rod 25 is made hexagonal in shape to facilitate the rotation of the rod to adjust the length of the connections. Nuts 26 serve to maintain the adjustment after it has been secured.

Carried Vby the cross head 18 is the bow spring 27. This spring 27 may be secured to the cross head 18 in a suitable manner, but preferably by means of U shaped straps 28, as best shown in Fig. 5. The ends of the spring 27 are pivoted by means of pins 29 to lug-s 30 carried by sleeves 31. The connecting rods between the ends of the spring 27 and the hammer 17 are each made of two parts. The outer part 32 of each of these rods passes through one of the sleeves 3l and is threaded at its outer end to receive the adjusting and lock nuts. 'The inner part 35 of each of the connecting rods is pivoted bymeans of a pin 3G to the stem of the hammer 17. The adjacent ends of the parts 32 and 35 of the connecting-rods are pivoted by means of the pins 37 to a pair of links 38.

Each of the parts 32 is provided with an internally threaded nut 39. This nut 39 has its outer faces beveled and these faces are adapted to make contact with corresponding internal .beveled faces upon the collar 4l. The nut 39 is split, as bcst shown in Fig. 4.

l The inner end of the collar 41 engages with the end' the two parts against rotation.

After the hammer has been assembled, it is necessary to properly adjustit, to compensate for variation in the tension of'the spring and also for slight inequalities in other parts of the machine and in order to accomplish this the nuts 39 and 26 are loosened. The length of the connection can then be varied by rotating the rod 25, and the tensionof the spring can be properly adjusted. by means of the nut 39. After the proper adjustments have been made, thc adjustment of the pitman is made permanent by moans of the nuts 26. As has been heretofore pointed out, the construction shown in detail in Fig. is such'that the tension of the spring bow 27 acting through the inner beveled faces of the collar Lil and the outer beveled faces of the nut 39 compresses the nut 39 firmly around the end of the rod, hence no additional locking means is necessa-ry. In fact, this orm or' nut holds the sleeve 3l firmly in adjustment, while I have found that the ordinary form of lock nut is incapable of holding the sleeve against the continual vibration oi the spring 27.

The form of the connecting rods is such as to allow freedom of motion of the parts and this prevents the excessive jars wliich tend to crystallize the parts of the machine.

Having fully described my invention, what I claim as new and desire to secure by. Letters Patent; o the United Stn-tes is:

1. 1n a power hanuner, the combination with a cross head, of a spring bow carried thereby, sleeves pivot'ed to the ends of said sp1-ine; how, a hammer, a pair ot' connecting rods eaeh pivoted at one end to said hammer and passing through one of said sleeves at the other end. each of said rods being provided with a pivotal joint intermediate its ends, means for adjusting:v the said sleeves on said rods. and means for actuating the said cross head. A 2. In a power hammer, the combination with a cross head, of a springbow carried thereby. a sleeve pivoted to each end of said spring how, a hanuncr. a pair ot" connectA ing rods eaeh comprising' two parts, one part of each of said connecting: rods heinev pivoted to said hammer and the other passing .through one ot' said sleeves. a pair oi' links pivoted to the adjacent ends oi"said parts. nuts for adjustingv said sleeves on said rods, and means for at-luat ing,r the said cross head.

il. in a power hammer, the eouibination with :t crosshead. of a sp1-inf,r how carried thereby, a hauuner. t conneeting.'` rod between each end of said springr how and said hammer, each of said connecting rods having a pivotal joint intermediate its ends, and the outer part ot' each of said connecting; rods being' pivoted to said how at a point above the axis of the rod, whereby the tension of said bow throws the inner end of said outer part'. upwardly, and means for operating said erosshead.

4. In a power hammer, the. combination with a crosshead. of a spring bo carried thereby, a hammer, a. pair of connecting rods each coinl'irisin.;y two pivotally connected parts. the inner part of each of said connecting rods beine pivoted to said hammer passing through a sleeve, an upwardly extending luf.: earried by each of said sleeves and pivoted to said spring: how, whereby the tension ot said how lthrows the inner end o1' said outer pari up\\'ardi and means for operating' said erosshead.

In testimony whereof, l have hereunto set, in hand aud atlixed lny seal in. the presence of vthe two subscribing' witnesses.

I'II'FER S. MACGUWAN. tl.. s.|

and the outer part` 

